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ID:36784273
大小:1.21 MB
页数:30页
时间:2019-05-15
《水蚤对污泥减量效果的研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、摘要随着城市污水厂越来越多污泥的产生,处理大量污泥的费用越来越高。利用微型动物的捕食作用减量污泥,由于能耗低,不产生二次污染,作为一种生态工程技术近年受到关注。当前主要的污水处理方式是活性污泥处理系统,多数活性污泥处理系统会产生大量的污泥。大量污泥通常含有多种有毒有害物质及未稳定化的有机物,如果不进行妥善的处理,将会对环境造成很大的污染。本文采用了节肢动物门甲壳纲通过比较COD和SS值进行污泥减量化的效果研究,得出以下结论:(1)水蚤适应环境的能力较强,但是最适水蚤生长的环境范围却很窄。适合水蚤生存
2、的温度为24℃,PH值为7,盐度为0.25%(2)水蚤在滤料外部繁殖的密度要远高于滤料内部,这说明水蚤在悬浮系统中生长状况好于附着型生长系统。(3)水蚤平均繁殖周期为三天,并且水蚤的日衰减率为14.67%(4)投加20个水蚤时COD的去除率为47.52%(5)水蚤具有一定的捕食细菌和减量污泥的能力。关键词:水蚤;污泥;污泥减量AbstractThesludgedisposalbecomesmoredifficultthanbefore,becauseofitsmoreproductionandexp
3、ensivedisposalcost.Thereductionofsludge,oneofecological‘approachesthroughpredationofmicrofaunal,hasbeenpaidmoreattentionbecause0fitslittleenergywasteandwithoutthesecondpollution.’Activatedsludgetreatmentsystemisleadingwatertreatmentmethods.Activatedslu
4、dgetreatmentsystemresultinalargenumberofsludge.Thereareaplentyoftoxicandhazardoussubstancesandunstabilizedorganicmatterinthesludge.Ifnotproperlyhandled,itwillresultindirectorpotentialenvironmentalcontamination.Inthispaper,Thedaphniafunctionforsludgered
5、uctionwasresearchedbycomparetheCODandSSofeffiuentwater.Theresultsindicatedthat:(1)Daphniahasstrongabilitytoadapttotheenvironment,buttheoptimalenvironmentforthegrowthofDaphniaisverynarrow.theoptimalforDaphniagrowisthetemperature:24"C,PH:7,salinity:O.25%
6、.(2)ThebreedingdensityofDaphniaintheexternalcarriershouldbemuchhigherthantheinternalcarrier,ThisshowsthatthegrowthofDaphniainthesuspensionsystemisbetterthanattachment-basedgrowthsystem.(3)Theaveragereproductivecycleofdaphniaisthreedaysandit’Sdecayrateo
7、fonedayisl4.67%.(4)When20Daphniawereadded,theCODremovalrateis47.52%.(5)Daphniahastheabilitytopreybacteriaandreducesludge.Keywords:Daphnia;sludge;sludgedecrementⅡJ】●目录摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯·IAbstract·····································
8、········································································II1概论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯·11.1污泥处理及污泥减量化⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯·11.1.1污泥处理的现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯·11.1.2污泥减量化的研究意义及重要性⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11.2污泥减量技术的研究
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